relay

Relay is a JavaScript framework for building data-driven React applications, developed by Meta and released under the MIT license. It is designed around GraphQL and aims to remove imperative data-fetching code from application logic. Key characteristics described in the README: - Declarative data fetching: developers declare data requirements using GraphQL fragments and queries, and Relay determines how and when to fetch the data rather than requiring manual calls to a data store. - Colocation: queries and fragments live next to the React views that depend on them, which the project presents as making an application easier to reason about. Relay aggregates queries into efficient network requests so only needed data is fetched. - Mutations: Relay supports GraphQL mutations for changing client and server data, and provides automatic data consistency, optimistic updates, and error handling. The README points to the official documentation site (relay.dev) for guidance on using Relay in a project. It also references the relay-examples repository, which contains a TodoMVC implementation; the documented workflow clones that repository, installs dependencies with yarn, runs code generation steps (yarn grats and yarn relay), starts a dev server, and opens the app at localhost:5173. The project welcomes pull requests and links to contribution guidelines. A community-maintained list of users and projects running Relay in production is available on the documentation site. The README credits contributors and acknowledges the community project relay-hooks, which allowed experimentation with Relay and React Hooks and provided feedback, including the origin of the useSubscription hook idea. This overview is based solely on the repository README and does not evaluate performance, popularity, or suitability for any particular use case.